This is where the harmonic balancer comes in. The circular device, made of rubber and metal, is bolted at the front end of the crankshaft to help absorb vibrations. It's usually connected to the crank pulley, which drives accessories like the air conditioner.
Additional costs: Ground water wells can also be tested for radon, then, if needed, can get a water radon mitigation system installed. Installing a water radon mitigation system runs from $1,000-$4,500, and maintenance runs $0 to $150 annually.
How much is a typical Radon mitigation system? Standard radon mitigation systems from professional, certified, licensed and insured contractors in Missouri have an average cost of $750 - $900, as compared to an average of over $1,000 across the United States.